Ofu (left) and Olosega (right) in eastern Samoa are parts of the same volcano separated by the Asaga Strait, with the island group reaching nearly 9 km across (including the smaller island to the west), shown in this 29 October 2018 Sentinel-2 satellite image (N is at the top). The islands have likely been shaped by flank failures with resulting debris avalanches below sea level.

Satellite image courtesy of Copernicus Sentinel Data, 2018.

This image is made available under the Creative Commons BY-SA 4.0 license terms.

Keywords: island volcano | landslide scarp

Ofu-Olosega